Yuliastuti Dwi Lestari, & Sudi Mungkasi. (2026). Numerical Solution Analysis Using The Runge-Kutta-Fehlberg Method on A Model of The Spread of Smoking Behavior. Mathline : Jurnal Matematika Dan Pendidikan Matematika, 11(2), 307–316. https://doi.org/10.31943/mathline.v11i2.1050